In a Stockholm museum, thieves steal an enormous Norse runestone, but not before killing a security guard. When Nina Wilde, head of the International Heritage Agency (IHA), and her husband, ex-mercenary Eddie Chase, arrive to investigate, they are told a chilling story: A scholar has discovered that the stone may be one of two keys to finding the mythological site of Valhalla, where the Vikings predicted the world's final battle would begin. The second stone lies at the bottom of a Norwegian lake. But when Nina and Eddie race to the scene, they're hit with a shocking surprise. --back cover.